Strftime and Kirby 2.2 creates a PHP warning

I updated Kirby on my computer and wanted to upload it, but before I did I saw a new PHP warning:

Warning: strftime() expects parameter 2 to be long, object given in /Volumes/Users/.../site/templates/blog.php on line 10

The code is unchanged:

<time class="byline__date" itemprop="datePublished" datetime="<?php echo $page->date('c') ?>"><?php echo trim(strftime('%e %B %Y', $page->date())); ?></time>

Is this a problem with Kirby 2.2 or am I missing something?

Kind regards,

Yes, this is a bug in Kirby 2.2. Nico wrote about the reason for the issue in this topic.